Table 2. Percent of Coupled Households in the United States by State, 4 -Year Average: 2000-2003.   Area Married couple households Unmarried partner households   Percent Margin of Error Percent Margin of Error United States 50.6 0.3 5 0.2   Alabama 51.2 0.84 3 0.49   Alaska 52.2 1.4 6.6 0.98   Arizona 50.8 0.81 6.3 0.57   Arkansas 52.9 0.95 3.6 0.58   California 49.6 0.52 5.8 0.36   Colorado 51.6 0.83 5.4 0.56   Connecticut 51.9 0.9 4.9 0.59   Delaware 50.6 1.3 5.9 0.89   District of Columbia 21.7 1.24 5.5 0.93   Florida 48.7 0.6 5.7 0.41   Georgia 50.2 0.73 4.2 0.46   Hawaii 52.9 1.2 5.8 0.83   Idaho 58.3 1.14 4.5 0.74   Illinois 49.9 0.66 4.7 0.43   Indiana 52.8 0.78 5.3 0.52   Iowa 54.1 0.93 5 0.61   Kansas 52.8 0.95 4 0.59   Kentucky 53.8 0.86 4.1 0.54   Louisiana 47.2 0.85 4.8 0.55   Maine 52.5 1.13 7.3 0.81   Maryland 49.7 0.81 5.5 0.55   Massachusetts 48.7 0.77 5 0.51   Michigan 50.6 0.69 4.9 0.45   Minnesota 54 0.81 5.1 0.54   Mississippi 48.2 0.95 3.8 0.59   Missouri 51.9 0.78 5.1 0.52   Montana 53.6 1.24 4.9 0.82   Nebraska 53.4 1.06 4.4 0.68   Nevada 48.2 1.02 6.3 0.71   New Hampshire 55 1.15 7.2 0.83   New Jersey 53.4 0.73 4.6 0.47   New Mexico 49.1 1.06 5.8 0.73   New York 45.6 0.59 5.1 0.39   North Carolina 51.5 0.72 4.1 0.45   North Dakota 52.6 1.36 4.6 0.88   Ohio 50.1 0.66 4.9 0.44   Oklahoma 52.7 0.9 4.3 0.57   Oregon 50.1 0.89 6 0.61   Pennsylvania 50.7 0.65 4.8 0.42   Rhode Island 47.2 1.2 5.6 0.82   South Carolina 50.1 0.86 4.1 0.54   South Dakota 53.7 1.31 4.2 0.83   Tennessee 50.9 0.78 4 0.49   Texas 52.8 0.58 4.3 0.37   Utah 62.9 1.02 3.4 0.62   Vermont 52.8 1.37 7.1 0.98   Virginia 52.2 0.75 4.6 0.48   Washington 50 0.78 5.9 0.53   West Virginia 52.5 1.04 4.7 0.68   Wisconsin 51.5 0.8 6.1 0.55   Wyoming 54 1.44 5.3 0.97                   Source: U.S. Census Bureau, American Community Survey 2002-2003, Census Supplementary Survey 2000-2001.